Table 1.

Disaccharide repeat composition and potential pentasaccharide glycan combinations for Hyaluronan (HA), Keratan Sulphate (KS), Chondroitin/Dermatan Sulphate (CS/DS) and Heparin/Heparan Sulphate (Hep/HS) glycosaminoglycans (GAG)

GAG	Disaccharide repeats	Pentasaccharide glycan combinations
HA	Glucuronic acid and N-acetyl-glucosamine	2
KS	Galactose and N-acetyl-glucosamine	64
CS/DS	Glucuronic or iduronic acid and N-acetylgalactosamine	1008*
Hep/HS	Glucuronic and/or Iduronic acid and N-acetyl-glucosamine	2916
Total		3990

Data obtained from Cummings (2009).

^*Errata from the reference above where the CS/DS combinations were reported as 3 × 4 × 3 × 4 × 3 = 423 instead of ‘=432’; this error adding nine more to their total of 999.